Explosive instability of ultrasonic triads under frequency modulated electromagnetic pumping.

Author

Preobrazhensky, V.L. ; Yevstafiev, O. ; Pernod, P. ; Berzhansky, V.

Author_Institution

Inst. of Electron., Microelectron. & Nanotechnol. IEMN, ECLille, Villeneuve-d´´Ascq, France

fYear

2009

fDate

20-23 Sept. 2009

Firstpage

2100

Lastpage

2102

Abstract

Explosive dynamics of three- phonon bound excitations in ultrasound frequency band is studied experimentally and theoretically on an example of magnetic medium under homogeneous electromagnetic pumping. Development of ultrasonic explosion is distorted by nonlinear acoustic effects in particular by nonlinear frequency shift of generated waves. It is shown in the present paper that a proper choice of frequency modulation of electromagnetic pumping allows to compensate the nonlinear frequency shift of acoustic vibrations and to reveal the quasi- singular amplification typical for explosive instability.

Keywords

antiferromagnetic resonance; explosions; magnetoacoustic effects; magnetoelastic effects; ultrasonic effects; vibrations; acoustic vibrations; explosive dynamics; explosive instability; frequency modulated electromagnetic pumping; magnetic medium; nonlinear acoustic effects; nonlinear frequency shift; three-phonon bound excitations; ultrasonic explosion; ultrasonic triads; Antiferromagnetic materials; Electromagnetic coupling; Explosives; Frequency modulation; Magnetic anisotropy; Magnetic resonance; Magnetostriction; Perpendicular magnetic anisotropy; Phonons; Soft magnetic materials; antiferromagnet; electromagnetic pumping; explosive dynamics; phase modulation; three- phonon excitation;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2009 IEEE International

Conference_Location

Rome

ISSN

1948-5719

Print_ISBN

978-1-4244-4389-5

Electronic_ISBN

1948-5719

Type

conf

DOI

10.1109/ULTSYM.2009.5441922

Filename

5441922